228240939089857 has 6 divisors (see below), whose sum is σ = 242456637718598. Its totient is φ = 214815001496064.

The previous prime is 228240939089831. The next prime is 228240939089869. The reversal of 228240939089857 is 758980939042822.

It can be written as a sum of positive squares in 3 ways, for example, as 88126583155776 + 140114355934081 = 9387576^2 + 11836991^2 .

It is a de Polignac number, because none of the positive numbers 2^k-228240939089857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228240939089897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 394880517168 + ... + 394880517745.

Almost surely, 2^{228240939089857} is an apocalyptic number.

It is an amenable number.

228240939089857 is a deficient number, since it is larger than the sum of its proper divisors (14215698628741).

228240939089857 is an equidigital number, since it uses as much as digits as its factorization.

228240939089857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789761034947 (or 789761034930 counting only the distinct ones).

The product of its (nonzero) digits is 1254113280, while the sum is 76.

The spelling of 228240939089857 in words is "two hundred twenty-eight trillion, two hundred forty billion, nine hundred thirty-nine million, eighty-nine thousand, eight hundred fifty-seven".